ASP.NET Web API 資料驗證

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第一種方式單獨為每一個Action做驗證

 // POST api/values        public HttpResponseMessage Post([FromBody]UserInfo userInfo)        {                     if (string.IsNullOrWhiteSpace(userInfo.Gender))            {                ModelState.AddModelError("Gender", "性別不可為空");            }            if (ModelState.IsValid)            {                // Do something with the product (not shown).                return new HttpResponseMessage(HttpStatusCode.OK);            }            else            {                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);            }        }public class UserInfo    {        public int Id { get; set; }        [Required]        [StringLength(20, ErrorMessage = "名字太長了或者太短了", MinimumLength = 4)]        public string Name { get; set; }        [RegularExpression(@"([2-5]\d)", ErrorMessage = "年齡在20-50之間")]        public int Age { get; set; }        public string Gender { get; set; }    }

第二種做全域驗證：

 public class ValidationAttribute : ActionFilterAttribute    {        public override void OnActionExecuting(HttpActionContext actionContext)        {            if (!actionContext.ModelState.IsValid)            {                actionContext.Response = actionContext.Request.CreateErrorResponse(                    HttpStatusCode.BadRequest,                    actionContext.ModelState);            }        }    }WebApiConfig.cs   config.Filters.Add(new ValidationAttribute());

 

ASP.NET Web API 資料驗證